Moving colors in a bitmap

[Thekid]

I want to take a simple bitmap which has 6 horizontal lines of color in it like this:
red
blue
green
red
blue
green
I want to move the lines of colors around like this:
red
red
blue
blue
green
green
The code below is what I was trying to work with but I get an error message that the tuple is out of range. Is there some other code I could use for this or is it feasible to use this code with some changes?

import sys
import Image
import ImageFilter

im = Image.open("7.bmp").convert("L")
source = im.split()

R, G, B = 0, 1, 2

# select regions where red is less than 100
mask = source[R].point(lambda i: i < 100 and 255)

# process the green band
out = source[G].point(lambda i: i * 0.7)

# paste the processed band back, but only where red was < 100
source[G].paste(out, None, mask)

# build a new multiband image
im = Image.merge(im.mode, source)

[Thekid]

I've decided to try a different approach to this. I made a white bitmap with 2 black squares in it to play with. I'm wondering if I could do something like this:

f = open("xmple.bmp", rb)
s = f.read()
print (repr)s

Could I now use some type of sorting algorithm to arrange things, then save the new bmp? I tried it like this, but it doesn't work:

f=open("xmple.bmp",rb)
s=f.read()
s1=s.sort
s1.save("xmple2.bmp")

[kudos]

I don't really understand your problem. Do you have an image, and want to sort the pixel values of all the pixels in the image?

-kudos

I've decided to try a different approach to this. I made a white bitmap with 2 black squares in it to play with. I'm wondering if I could do something like this:

f = open("xmple.bmp", rb)
s = f.read()
print (repr)s

Could I now use some type of sorting algorithm to arrange things, then save the new bmp? I tried it like this, but it doesn't work:

f=open("xmple.bmp",rb)
s=f.read()
s1=s.sort
s1.save("xmple2.bmp")

[Thekid]

Yes, I'm just not sure how to go about it so I was trying to 'read binary' and sort somehow like that.

[kudos]

Are you familiar with PIL(if not, check it out, it a nice (but a bit dated) API) ? Here is how I would do it

from PIL import Image

iy = Image.open("kudos.png")
ysize = iy.size()
iwidth = ysize[0]
iheight = ysize[1]
ix = Image.new("RGB",(iwidth,iheight+1))


colors = {}
for i in range(iheight):
 for j in range(iwidth):
  a = iy.getpixel((j,i))
  if(not(a in colors)):
   colors[a] = 0
  else:
   b = colors[a]
   b+=1
   colors[a] = b

x = 0
y = 0
s = colors.keys()   
for v in s:
 for i in range(colors[v]+1):
  if(x + 1 >= iwidth):
   x=0
   y+=1
  else:
   x+=1
  ix.putpixel((x,y),v)
ix.save("result.png","PNG")

-kudos

[Thekid]

Thank you for the reply Kudos. When I try that code I get this error message:

File "C:\Python25\bm p2.py", line 4, in <module>
ysize = iy.size()
TypeError: 'tuple' object is not callable

[kudos]

did you change the image that was going to be loaded? maybe change the format, paste in the code & image that creates trouble

-kudos

Thank you for the reply Kudos. When I try that code I get this error message:

File "C:\Python25\bm p2.py", line 4, in <module>
ysize = iy.size()
TypeError: 'tuple' object is not callable

[Thekid]

Kudos, I took your code and just change the name of the file to my file. I tried it as png format and bmp but got the same error message either way. I don't know how to put the images in here so I uploaded them on imageshack. The first one is just a plain one with 2 black squares, the second one is striped with red,blue,green, red,blue,green lines. I made the plain one because I thought it would be easier to tell the black pixels from the white ones.
http://img90.imageshac k.us/my.php?image=x7 xxzq4.png
http://img80.imageshac k.us/my.php?image=xm ple2sb5.png

[kudos]

aaa...it turns out that there was a type in the code!

try this:

from PIL import Image
iy = Image.open("testme.png")


ysize = iy.size
iwidth = ysize[0]
iheight = ysize[1]
ix = Image.new("RGB",(iwidth,iheight+1))


colors = {}
for i in range(iheight):
 for j in range(iwidth):
  a = iy.getpixel((j,i))
  if(not(a in colors)):
   colors[a] = 0
  else:
   b = colors[a]
   b+=1
   colors[a] = b

x = 0
y = 0
s = colors.keys()   
for v in s:
 for i in range(colors[v]+1):
  if(x + 1 >= iwidth):
   x=0
   y+=1
  else:
   x+=1
  ix.putpixel((x,y),v)
ix.save("result.png","PNG")

-kudos

Kudos, I took your code and just change the name of the file to my file. I tried it as png format and bmp but got the same error message either way. I don't know how to put the images in here so I uploaded them on imageshack. The first one is just a plain one with 2 black squares, the second one is striped with red,blue,green, red,blue,green lines. I made the plain one because I thought it would be easier to tell the black pixels from the white ones.
http://img90.imageshac k.us/my.php?image=x7 xxzq4.png
http://img80.imageshac k.us/my.php?image=xm ple2sb5.png

[Thekid]

Awesome! Works great....thank you!